Engine overheating causes
Internal combustion engines run on heat. Most engines today are designed to operate within a “normal” temperature range of about 195 to 220 degrees F. A relatively constant operating temperature is absolutely essential for proper emissions control, good fuel economy and performance. If the engine overheats and exceeds its normal operating range, the elevated temperatures can cause extreme stress in the cylinder head which may result in a head gasket failure. This, in turn, may lead to a loss of clamping force in critical areas and allow the head gasket to leak. If engine overheats, coolant can boil out of the radiator and be lost.
Overheating can be caused by anything that decreases the cooling system’s ability to absorb, transport and dissipate heat: poor heat conductivity inside the engine because of accumulated deposits in the water jackets, a low coolant level, poor airflow through the radiator, a collapsed lower radiator hose, or even a defective radiator cap (saturn hood). The instant you notice a serious overheat condition, turn off your air conditioner and turn your heater on full blast, and open the windows. Those steps just might save your engine.
